A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts for steam turbines
NSN 5920-01-510-9921
NSN 5835-01-072-7693
NSN 2925-00-139-8309
NSN 5905-00-462-8230
NSN 5855-01-454-0704
NSN 5990-01-604-0862
NSN 5925-00-706-9975
NSN 5925-00-255-2048
NSN 6645-01-160-7707
NSN 2925-01-577-0004
NSN 6130-01-411-7735
NSN 5855-01-434-1041